Hi,

Ive been doing some data logs from the PLX wideband while the car is still stock, to get an idea of AFR's and knock.

Im getting 14-15 AFR at idle
Im getting 13 at WOT, and then 19 when lifting off the throttle (overrun)

Does that seem ok?

Knock volts at max are 2.2 rising with revs but 2 is a normal high peak.

MB

 

That seems quite lean compared to my dyno testing before FI. I was getting 12-13 are part throttle and 10-12 at WOT depending on intake temp (thus timing). Best performance seems when timing advance is at 16-18 deg. timing dropped to 12-14 deg. when intake temp was above 130 deg. F.

cheers

W

 

This is about what I ran when I was stock for A/F.
Near redline my A/F would be 12ish, 6000rpm to 8000prm it was in 13 range.
Idle was aorund 14.5 and so was part throt.

Wael El-Dasher, is that 16 degrees total timing at redline?
Thas what I run turbo, stock is around 25 degrees

 

Cheers!

Going to buy a new MAP anyway before putting the SC on - just to be catious. I have a distrust for MAP / MAF sensors

MB

 

Where you guys getting timing info from?

MB

 

So you have your a/f at 12-13 for all partial throttle? I thought you wanted it in the 14-15 range for gradual acceleration.

 

My partial throttle is between 14 and 15, more rapid up and down than idle as you would expect.

I get quite a dip in AFR at peak revs (8900)

Starts dropping from 13 at 8000rpm to 11.1 at redline. Is this normal?

MAP volts are flat at 2.8 but dip to 2.37 at redline so that does seem to be failing?

Advice!

MB